Chimney or stack.



PATENTED MAR. 31, v1190s.

0. T. BENSON.

OHIMNEY 0R STACK. APPLICATION FILED APR. 44.71907.

OSCAR T. BENSON, OF WORCESTER, MASSAOHUSETTS.

CHIMNEY OR STACK.

Specification o! Letters Patent.

Patented Mai-ch 31, '1901s.

Application led April 4, 1907. Serial No. 366,424.

Be it known that I, Osoin. T. BENSON, a citizen of the United States, residing at Worcester, in the county of Worcester and State of Massachusetts, have invented anew and useful Chimney or Stack, of which the following is a specification.

This invention relates to a construction for chimneys or stacks.

The principal. objects of the invention are to provide a reinforcing structure which can be set up in position and the arts thereof securely connected together efore the concrete is applied. Also to rovide 'an 'improved facing preferably for t e inner surface of the chimney; and generally, to improve the construction of chimneys or stacks in which a metallic reinforcing frame is embedded in the concrete and a facing of tiles or bricks is employed.

Reference .is to be had to the accompanying drawings in which,

Figure l is a side elevation partly in vertical central section showing a preferred form of the invention. Fig. 2 is a horizontal section of the same on the line 2 2 of Fig l'.

- Fig. 3 is a fragmentary sectional view on an enlarged scale, and E 1g. 4 is a similar view showing a modification.

The foundation is niadcwith a base 10 constructed of concrete or the like and having two series of metallic bars 1l embedded therein. Also embedded in this base is an angle-iron 12 preferably of circular forni to which are secured the lower ends of a series of vertical reinforcing bars 13 which may be of angle-iron, channel-iron, T-iron, or of any desired form. Also located in the base of the foundationare a series of angle-irons .14, in the present instance four of these are shown extending toward the four corners of the foundation. From. these angle -irons strengthening bars 15 extend upwardly on an incline being secured to the upright strengthening bars at a point near the ground line 16. Each angle-iron 14 is `shown as connected y with three of the bars 15 and the latter bars are rovided with tie rods 'or hooks 17 exten(` inof inwardly to be embedded in the concrete o which the upper part 18 of the foundation is formed.

It is to be noted that the metal parts so far 'described are supported by the bars 12 and 14 and are set up to, occupy the positions they are to occupy in the completed structure. The body of concretelS is applied to them to surround .and embed them, a mold being used if desired to form the. exteriory shape ofthe foundation.

Above theground .line the irons 13 are extended to the desired height being connected with each other by two sets of "tie rods 19. The lower ends of these tie rods are secured to the u nights, preferably at'a oint near the top of the foundation 18 and t ey arewound around continuously to the top of the chimney or stack. tie rods is wound inside the uprights and the other outside, 1both being secured to the uprights where they cross them.

It will be seen that the metal work of the chimney can be reared in advance of the application of the concrete thereto in a manner similar t'o that in which steelframe buildings are made and that the molds can then be applied and concrete molded to its final form around its self-sustaining frame work. is an improvement over those forms of construction in which the reinforcing rods are merely placedin position as the concrete is molded, for the reason that the frame-work is self-sustaining and does not depend on the concrete for support in any s'ense of the word.

As is usual with chimneys of this kind, the concrete wall extends up to a point at which the heat enters the chimney and above that an air space is provided for some distance in a lining which may be made of tiles, firebricks or the like. In the present instance,

the lining is made by a series of tiles 20.

Each tile has a -pair of walls 2l at each end separated by an open space 22, two of these spaces oir-adjacent tiles coming together to form an air space. Each tile also is provided with a central air space 23. On the inside of the tiles they are provided with dove-tailed projections 24 vfor receiving the concrete and locking the tiles thereto in an effective manner. lf desired, the tiles may This One of these spiral or helical be made without the air space in a manner similar`to the tiles 25 shown in Fig. 4. In this case, when they are used on the inside of the chimney, boards are placed vertically along the spaces between the projections 24 and are withdrawn when the concrete has been molded to leave the necessary' air spaces at this point. The chimney can be made in other ways, .as for instance :in Fig. 4, is shown a series of fire-bricks 26 which are spaced from the inner concrete wall to form a continuous air space 27. Tiles 25 similar to those above mentioned are shown on the outside of this chimney. Whatever fthe form r itself, application of the concrete thereto is ycarried outzm a most simple manner. over, the chimney is stronger .and in instances may `be made with some' economy l in concrete without sacrificing its strength. vThe air spaces inthe inner wall of the chimney formed either in the tiles 20 or by removing the parts. as indicated or by leaving a space between the fire-bricks and'wall, are preferably' provided with openings at some point in the inner surface of the wall to allow Morefor contraction and expansion, but when tiles are used this is not necessary for the reason' tht tiles are sufficiently porous to prevent' any trouble from the expansion and contraction of air in thev air spaces, It is to be seen that a chimney constructed in `acco'rdance with this invention is very strong Y and durable.

' W'hile I have illustratedJ and described a particular form of the inventional am aware that many modifications may be made therein without departing from the spirit of ythe same a's expressed lin the claims. fore, I do not wish to be ticular form shown, but vWhat'l do claim is l. `ln a chimney or stack, the combination:

of a circular strengthening angle-iron, up*A `right strengthening rodsjsecured thereto .at

then' lower ends, inclined rods connected j,

with slantmg outer' walls fer receivmg sald with the`upright rods and Ah aving their lower ends secured at about't'he level ofthe circular strengthening iron'j solid crete surrounding all of`said irons and rods to constitute a foundation', 'a circular wall resting on said foundation and consisting of spiral or helicalftie'rods secured to said uprights, and a hollow cylindrical body ofconcrete surrounding the uprights and y,tie rods.

2.lv In a chimney or stach, the combination of a concrete foundatiom'an anglejyiron embedded intl-1e baseY of said foundation, reinforcing bars having thcirlower ends secured to the upwardly projecting/portion of said angle iron and extending ,upwardly therefrom through the entire length of the structure, a series of angle irons embedded'in the ibase outside of the first named angle iron and in4 substantially the same'plane', strengthening bars secured to, and/extending at an angle j 'tending up to a point lower'part of the upper part may be made in` said first named some There? limited to the par-;

body of conport1on of said angle from, the lastn am e'd angle irons upwardly and connecting with said reinforcing bars, said foundation having projections for receiving said strengthening bars, said foundation exof said strengthening bars andprojections, and a hollow cylindrical stack formed of concrete resting on the top ofsaid foundation.

3i In a chimney or stack, the combination ofa concrete foundation, an iron embedded in the base of said foundation, reinforcing Abars having their lower ends secured to said upwardly therefrom,r

iron and yextending through the entire length of the structure, lseries of irons embedded in the base outside iron and in substantially the same plane, strengthening bars secured to, and extending at an angle from, the last named irons upwardly and connecting with said reinforcing bars, said foundation having projections for receiving said strengthening bars, said projections being integral with the main body of the foundatiod'each of said inclined strengthening bars beingcprovi'ded with a plurality of hooks extending inwardly into the main body of said foundation and A along' the onv the to'p located at different elevations same, and a hollow'stacl resting of said foundation.

4,. In a chimneyor stack, the combination of'a solid concretefoundation, series of metallic bars embeddednear the bottom there-v of, a circular angle iron embedded in the base of said foundation above said bars, vertical reinforcing bars having their lower ends secured to the upwardly projecting portion of said angle iron and extending u wardiy therefrom through' the entire lengti of the slightly above the top 7 structure, a series of angle irons embedded in the base outside said circular in substantially the same plane, strengthening bars secured to, and extending at an angle from, the' last named angle irons upwardl-y and connecting with said reinforcing bars, said foundation having projections angle iron an d strengthening bars, said projections ,being integral with the main body of' the foundation, said foundation being solid up to a point slightly above the top of said strength ening bars and projections, and a hollow cylindrical stack formed of concrete resting on the top of said foundation and having tie rods embedded in the body thereof and secured to said reinforcingbars. j

5. In a chimney or stack, the combination of a solid concrete foundation, a series of metallic bars embedded near the bottom thereof, a circular angle iron embedded in the hase' of said foundation above said bars',

vertical reinforcing bars having their lower ends secured, to the upwardly projecting iron and extendi upwardly therefrom throughr the entire length of the structure, a series of four angle irons embedded in the` basev outside said having four projections with slanting outer" walls for receiving lsaid strengthening bars, said projections being integral with the main body of the foundation, each oi" said ineiined strengthening bars beingl oro'vided withja plura 'tyof substantially nolrizo'ntai hooks extending inwardly into the main body-of said foundation and located at different elevations along the saine, said vfoundation being soiid up to apoint slightly above the bars and projections, and a hollow cylin rical stack formed of concrete resting on the top of said foundation. and havin@ tie roos embedded in the lpedy thereof and secured. to saidreinforeing ars.

6. In a chimney or stack, the combination of a solid concrete foundation, a series of' metallic bars 'embedded -near the bottoni thereof, a circular angie-iron embedded in the base oit' said 'oundation above said bars, vertical reinforcing bars having their lower ends` secured to the 'upwardly projecting portion of said angle iron and extending upwardly therefrom through the entire length of the structure, a series of four angle irons Aembedded in the base outside said circular angle iron and in substantially the same plane, strengtheni l' bars secured to, and extending at an ano' e frein, the last named angleironsvupwardly and connecting with said'reinforcing bars, said foundation hav-.-

ing four projections with slanting outer walls ior'receiving said strengthening bars, 'said projections being integral with the main body ofv the foundation, said foundation being solid up to a point slightly above the top of said strengthenin bars and projections, and aholiow cylin rical stack formed of concrete resting on the top of said toonde tion .and having tie rods embedded in the body thereor1 and securedto'said reinforcing bars, said. stackhaving an inner'wali inside said reinforcing bars and tie rods composed of tiles having air'yspaccs extending verti.'N cally therethrough', and having projections bywhich they are tied to said concrete wall @said projections being embedded the same. f 7 in a chimney or stack, the combination of a solid concrete foundation, a circuiar angle iron embedded in the base of said foundation, vertical reinforcing bars having their lower ends secured to the upwardiyy projecting portion oi said angle iron and extending'upwardly therefro1n," series angie irons embedded in, the base outside said circular angleiron and in substantially the same plane, strengthening bars secured. to, and extending at an angle tronim the last named angleirons upwardly land connecting withsaid reinforcing bars, said foundation havingproje'ctions 'lor receivin said strengthening bars, and a hollow cy ndrioal stack formed of concrete resting on the top of said foundation and having tie rodsl embedded in the body thereof and secured to said reinforcing bars, said stack having an inner wall inside said reinforcing bars and tie rods composed ing vertically therethrough, and having pro jections by which they are tied to said concrete wall, said projections being embedded in the same.

In testimony whereof I- havel hereunto set my hand, in the presence of two subscribing 'witnesses A OSCAR TBENSQN.

Witnesses l ALBERT E. Far, C. Fonnnsr Wesson.

ol" tiles having air spaces extend- Cir 

